How can restructuring a database schema in PHP improve the efficiency and accuracy of data retrieval for complex queries?

Restructuring a database schema in PHP can improve the efficiency and accuracy of data retrieval for complex queries by optimizing the table structure, indexing columns appropriately, and normalizing data to reduce redundancy and improve data integrity. By organizing the database schema in a more efficient way, queries can be executed faster and with more accurate results.

// Example of restructuring a database schema in PHP

// Before restructuring
// Table: orders
// Columns: order_id, customer_id, product_id, quantity, total_price

// After restructuring
// Table: orders
// Columns: order_id, customer_id, order_date, total_price

// Table: order_items
// Columns: order_item_id, order_id, product_id, quantity, item_price